Lock and latch



(N0 Mbdeij O. J. BRUGMAN.

LOGK AND LATCH.

Patented Nov, 21, 1893.

@ ZJVVE/VTOQ $12M fi s/W 4 WITNESSES V aa w NATIONAL UNITED STATESPATENT O tc OTTO J. BRUGMAN, F MANISTEE, MICHIGAN.

LOCK -AN D LATCH.

SPECIFICATION forming part of Letters Patent No. 509,016, dated November21, 1893.

Application filed June 3, 1892. SerialNo. 435,447. (No model.) 7

To all whom, it may concern;

Be it known that I, OTTO J. ,BRUGMAN, a

- citizen of the United States, residing at Manistee, in the county ofManistee, State of Michigan, have invented certain new and usefulImprovements in Locks and Latches; and I do declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

This invention relates to new and useful improvemen -s in locks andlatches, especially designed for use on doors, and it consists in theconstruction and arrangement of parts, as will be hereinafter fully setforth and the essential features particularly claimed.

The object of the invention is to provide means in connection with adoor-lock for simultaneously locking both the latch and lock bolts, torender the lock doubly secure and proof 1 against picking, which objectis attained by the mechanism illustrated in the accompanying drawings,in which- Figure l is a perspective view of my improved lock having oneside of the case removed, and showing also in perspective the severalparts removed, therefrom, their respective positions within the casebeing indicated by dotted lines. Fig. 2 is a side elevation of the lockhaving one side of the case removed, and the knob stem in section. Fig.3 is a sectional View taken on dotted line 33 of Fig. 2. p

Referring to the letters of reference, A is the lock case, which is ofthe usual form.

B is the latch bolt, havingthe ordinary beveled end that projectsthrough one edge of the case, and has its rear end provided with anenlarged head a, and an elongated slot b, through which the square shankof the knobstem 0 passes, and projecting from the center of saidknob-stem at one side thereof is a lugc, having a wedge-shaped orinclined face that bears against the inner beveled face of the head a ofthe latch bolt B. Said lug 0 travels in a slot or way (1 formed in oneside of the case A, and. has a shoulder e formed on the outer endthereof, that is adapted to strike against the case and limit themovement of the knob stem, as clearly shown in Fig. 3. By thisconstruction, as the knobstem is drawn endwise through the case'A, theinclined face of the lug a traveling at an angle to the beveled face ofthe head a of the latch-bolt, will cause said .bolt to recede at a rightangle to the movement of the knobstem, thus Withdrawing and disengagingits forward end from the keeper at which time the shoulder e on the luga will have checked the movement of the knob-stem, as stated, when byreleasing said knob-stem it will be returned to its formerv position bythe latch bolt as it is forced outward by the action of the spring f.The body portion of the spring is formed in a coil f, that is receivedby the pin h, which also passes through the tumbler D and slot 2' in thelock-bolt E and into the case'A, the free ends of said spring havingengagement, one with the latch-bolt, the other with the tumbler, as iscommon inlocks of thisclass.

Fjs an upright locking slide that is embolt andrendering the knob-stemimmovable when the lock-bolt is inserted in its keeper. Said slide islocated in a vertical position at the'rear of the latch and lock-bolts,and is sup ported upon the latter by means of the stem r, that projectsat a right angle from the rear upper corner thereof, and extends throughthe rear vertical portion of the angular way s (formed in one end of thetumbler D) and into the vertical portion of the right-angled way t,formed in the rear edge of said slide, this beingthe normal position ofthe parts when the door is unlocked. (See Fig. 1.)

Formed in the lower frontedgeof the lockmovable both latch-bolt andknob-stem. The

rear lower edge of the lock-bolt is provided with a circular way u,similar to the one described in the locking-slide, and into which thewing of the key passes after having raised the tumbler'D to cause thehorizontal portion of the angular way 5 to register with the stem 2? ofthe lock-bolt, which stem also registers with the horizontal portion ofthe right angled way 2,, and allows said stem to be carried therethroughas the lock-bolt is forced outward by the action of the key, which as itcompletes its rotation allows the tumbler'to drop by the tension of thespring thereon, and engage the stem t within the forward verticalportion of the H-shaped slot, see Fig. 2, in which position the tumblerlocks said stem to retain the lock bolt in an extended position andsupport the locking slide in an elevated position to look from movementthe latch-bolt and knob-stem, when, by a reverse motion of the key theparts will be unlocked and carried back to their former position, aswill be readily understood. See Fig. 1.

It will be apparent from the foregoing that the parts comprising myimproved latch and lock are comparatively few, simple, and compact,forming a secure lock that can only be picked with great difficulty, andrendering natural and easy the manipulation of the knobs in operatingthe latch thereof, requiring only to draw or pull upon the knob as inopening the door from theinside, and to press or push upon the oppositeknob when entering from the outside.

Having thus fully set forth my invention,

what I claim as new, and desire to secure by Letters Patent, is

1. In a lock, the combination of the latchbolt, the lock-bolt having aright angle stem on the rear end thereof, the vertically reciprocallocking-slide having an angle way therein that receives the stem of thelock-bolt upon which stem said locking-slide is supported,said partsadapted to be actuated by the key, so as to raise said locking-slideinto the path of the latch-bolt and carry said lock-bolt forward so thatthe stem thereon will support said locking-slidein that position. n

2. In a lock, the combination of the latchbolt, the lock-bolt having thestem at its rear end, the tumbler having an angular slot that receivessaid stem, the vertically reciprocal locking-slide having a right-angleway that also receives said stem, the end portion of the locking-slidewhen raised extending into the path of the latch-bolt, the springengaging the tumbler and the latch-bolt, said parts being adapted to beoperated, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

OTTO 'J. BRUGMAN.

Witnesses:

THEODORE EBERAN, yJEss O. WITHERELL.

